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Table 1 Questionnaire used in this study and expected answers for each case

From: Discrepancies in periodontitis classification among dental practitioners with different educational backgrounds

I am a postgraduate resident (or a faculty) in _______

1. Periodontics

2. Advanced General Dentistry

3. Endodontics

4. Prosthodontics

5. Orthodontics

How familiar are you with the 2018 periodontal disease classification?

1. I am not aware that the 2018 periodontal classification is available

2. I am aware of the 2018 periodontal classification, but I am not using it in my practice

3. I am aware of the new periodontal classification and am in the process of integrating it into my practice

4. I am diagnosing patients exclusively using the 2018 periodontal classification

Case 1

1) Based on the clinical and radiographic evaluation, diagnose this patient’s periodontal disease with Stage and Grade

Expected Answer: Stage III, Grade C

2) Does this patient have any risk factors for periodontal disease? If yes, please indicate the risk factor(s)

Expected Answer: None

Case 2

1) Based on the clinical and radiographic evaluation, diagnose this patient’s periodontal disease with Stage and Grade

Expected Answer: Stage IV, Grade B

2) Does this patient have any risk factors for periodontal disease? If yes, please indicate the risk factor(s)

Expected Answer: Diabetes and smoking

Case 3

1) Based on the clinical and radiographic evaluation, diagnose this patient’s periodontal disease with Stage and Grade

Expected Answer: Stage II, Grade B